When is a cube not a cube? When it's a Logitech Cube. That is, a mouse and presentation device which, though called a Cube is not a cube. You follow? Here's the thing: when you put it on a desk it behaves like a mouse, but when you pick it up it automatically goes into "Presenter Mode" for navigating PowerPoint presentations like a pro (because without one, PowerPoint is really, really hard). But it's the Cube's in-built gestures (all both of them) that separate it from the herd. Warning: this article contains unavoidable double entendres.